Stipple-engraved portrait of Benjamin Martin
1815
Demainbray's cometarium
1750-1760
Edmund Culpeper
1720
100 Link Steel Surveying Chain, 1784.
1784
Thomas Tuttell
1695-1702
Clarke's Hydrometer (c. 1755)
1755
Demainbray's wharf jib crane model
1729-1753
George III's weighted cylinder
1762
Unweighted cylinder in frame
1762
Section of lightning conductor from St Paul’s cathedral
1769
The Improved Pedometer or Waywiser
1765-1806
Cupellation furnace
1696-1700
Trade card for John Yarwell, optician, London, England, 1697
1697
Square signed "J.Ramsden, 1757"
1757
Slide rule for exchange of weights and measures
1815
Hindley's pyrometer and three expansion tubes made by Henry Hindley
1752
Glass bell jar with a brass collar
1761
King George III's friction machine
1762
Chronometer in Gold Case by Thomas Earnsham, 1795-1810
1795-1810
George III's apparatus for oblique and compound collision
1762
Double brass stand for bell jars on a brass pillar
1761
Experimental carbon pencil microphone, 1878-1890
1878-1890
model carriage chassis with two axles, 1762
1762
Powdered graphite microphone, 1878-1890
1878-1890
Single-lens Cine Camera by Louis Le Prince
1888
George III's cycloidal pendulum
1762
George III's tidal demonstration model
1762
King George III's central forces machine
1762
George III's pendulum
1762
Crossley table telephone, 1879
1879
Replica of Bell's 1876 'iron-box' receiver, 1959
1876
Bell telephone, mahogany case, 1878
1878
Experimental microphone, 1878-1890
1878-1890
Experimental carbon block microphone, 1878-1890
1878-1890
Experimental microphones with carbon pencils and cups, 1878-1890
1878-1890
Granular microphone in glass tube, 1878-1890
1878-1890
Coherer with coarse brass turnings, 1894
1894
Bright's bell telegraph, 1855
1855
Specimen of telegraph cable laid in Birmingham in 1856
1856
Cylinder electrical machine, 1810-1817
1810-1817
Henley's magneto electric double needle telegraph, 1848-1852
1848-1852
Single-needle telegraph by W. F. Cooke, 1840-1860
1840-1860
Wheatstone's portable ABC telegraph, 1858
1858
Receiving ‘jigger’ used by the Marconi Company, 1899
1899
Filings coherer, Lodge pattern, 1895-1900
1895-1900
Atlantic cable specimen, 1865
1865
Wheatstone printing telegraph, 1841
1841
Stroh's type-printer for Wheatstone ABC communicator, 1870-1881
1870-1881
Filings coherer, glass tube formed into T-shape at one end and bent round into U-shape at other end with bulb, 1899
1899
Specimen of Dover-Calais telegraph cable, 1851
1851